i've ordered from play asia before and it was they were good. it came when it was suppoed to and was hassle free. granted i have only bought once from there but still... i would again.
one of my friends did something where he replaced some of the 'system preferences' code on my memory card and then i gave him a ps1 game and whenever the ps1 game and the memory card were in the ps2 hd loader/ advance would load up...
i have no idea how he would do this.. but it is awesome